// Gdk.Event.cs - Custom event wrapper 
//
// Authors: Rachel Hestilow <hestilow@ximian.com> 
//          Mike Kestner <mkestner@novell.com>
//
// Copyright (c) 2002 Rachel Hestilow
// Copyright (c) 2004-2009 Novell, Inc.
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of version 2 of the Lesser GNU General 
// Public License as published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this program; if not, write to the
// Free Software Foundation, Inc., 59 Temple Place - Suite 330,
// Boston, MA 02111-1307, USA.


namespace Gdk {

	using System;
	using System.Runtime.InteropServices;

	public class Event : GLib.IWrapper {

		IntPtr raw;

		public Event(IntPtr raw) {
			this.raw = raw;
		}

		public IntPtr Handle {
			get { return raw; }
		}

		[DllImport(Global.GdkNativeDll, CallingConvention = CallingConvention.Cdecl)]
		static extern IntPtr gdk_event_get_type();

		public static GLib.GType GType {
			get { return new GLib.GType(gdk_event_get_type()); }
		}

		[StructLayout(LayoutKind.Sequential)]
		struct NativeStruct {
			public EventType type;
			public IntPtr window;
			public sbyte send_event;
		}

		NativeStruct Native {
			get { return (NativeStruct)Marshal.PtrToStructure(raw, typeof(NativeStruct)); }
		}

		public EventType Type {
			get { return Native.type; }
			set {
				NativeStruct native = Native;
				native.type = value;
				Marshal.StructureToPtr(native, raw, false);
			}
		}

		public Window Window {
			get { return GLib.Object.GetObject(Native.window, false) as Window; }
			set {
				NativeStruct native = Native;
				native.window = value == null ? IntPtr.Zero : value.Handle;
				Marshal.StructureToPtr(native, raw, false);
			}
		}

		public bool SendEvent {
			get { return Native.send_event != 0; }
			set {
				NativeStruct native = Native;
				native.send_event = (sbyte)(value ? 1 : 0);
				Marshal.StructureToPtr(native, raw, false);
			}
		}

		public static Event New(IntPtr raw) {
			return GetEvent(raw);
		}

		public static Event GetEvent(IntPtr raw) {
			if (raw == IntPtr.Zero)
				return null;

			NativeStruct native = (NativeStruct)Marshal.PtrToStructure(raw, typeof(NativeStruct));
			switch (native.type) {
				case EventType.Expose:
					return new EventExpose(raw);
				case EventType.MotionNotify:
					return new EventMotion(raw);
				case EventType.ButtonPress:
				case EventType.TwoButtonPress:
				case EventType.ThreeButtonPress:
				case EventType.ButtonRelease:
					return new EventButton(raw);
				case EventType.KeyPress:
				case EventType.KeyRelease:
					return new EventKey(raw);
				case EventType.EnterNotify:
				case EventType.LeaveNotify:
					return new EventCrossing(raw);
				case EventType.FocusChange:
					return new EventFocus(raw);
				case EventType.Configure:
					return new EventConfigure(raw);
				case EventType.PropertyNotify:
					return new EventProperty(raw);
				case EventType.SelectionClear:
				case EventType.SelectionRequest:
				case EventType.SelectionNotify:
					return new EventSelection(raw);
				case EventType.ProximityIn:
				case EventType.ProximityOut:
					return new EventProximity(raw);
				case EventType.DragEnter:
				case EventType.DragLeave:
				case EventType.DragMotion:
				case EventType.DragStatus:
				case EventType.DropStart:
				case EventType.DropFinished:
					return new EventDND(raw);
				case EventType.VisibilityNotify:
					return new EventVisibility(raw);
				case EventType.Scroll:
					return new EventScroll(raw);
				case EventType.WindowState:
					return new EventWindowState(raw);
				case EventType.Setting:
					return new EventSetting(raw);
				case EventType.OwnerChange:
					return new EventOwnerChange(raw);
				case EventType.GrabBroken:
					return new EventGrabBroken(raw);
				case EventType.Map:
				case EventType.Unmap:
				case EventType.Delete:
				case EventType.Destroy:
				default:
					return new Gdk.Event(raw);
			}
		}
	}
}